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Finding the Fourth Proportional to 360.45, 540.66 and 129.35

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Solution

The fourth proportional to 360.45, 540.66 and 129.35 is: 194.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.45 : 540.66 = 129.35 : x
  2. Step 2: Convert to fraction form
    360.45/540.66 = 129.35/x
  3. Step 3: Cross multiply
    360.45x = 540.66 × 129.35
  4. Step 4: Simplify right side
    360.45x = 69,936.21
  5. Step 5: Solve for x
    x = 69,936.21/360.45
  6. Step 6: Final answer
    x = 194.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.